Surveillance photos and video show the hooded suspect initially entering the store's back door holding a knife in his right hand. Police say he momentarily left, then went back inside and made his way through a small storage room to the kitchen area.

He went about his crime quietly. Police say he said nothing to any of the workers and apparently was not seen by them before he walked back into the storage room, took a purse and left the store.

The knife in the suspect's hand can be seen in this photo.(Photo11: Plymouth Police)

Anyone who has information about the incident is asked to call Plymouth Police detectives at 734-453-1234 or 734-453-8600.